Tube-number record
3A/144A
0 archive entries
3A/144A is a tube type in the TubeDatabase archive (class: Repeater Triode). Recorded specifications: construction Triode, socket 4-pin, maximum plate voltage 190 V, and maximum plate dissipation 5 W. The archive does not yet hold a photographed example of this type.
ClassRepeater Triode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialOxide-coated
Absolute Maximum Ratings
Plate Voltage190 V
Plate Dissipation5 W
Cathode Current60 mA
Audio Performance
Power Output0.3 W
Key Features
- Oxide-coated filament
- Repeater Triode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 130 V | 1210 | 1900 | 2.3 | 31.3 mA |
| Class A | 130 V | 1150 | 2000 | 2.3 | 25.2 mA |
| Class A | 130 V | 1095 | 2100 | 2.3 | 20.5 mA |
| Class A | 160 V | 1210 | 1900 | 2.3 | 35 mA |
| Class A | 160 V | 1210 | 1900 | 2.3 | 29 mA |
Application Notes
3A/144AY is the 3A/144A tested to special limits for replacement purposes only.
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